The Elastica2 script has some sort of Bug. (MoI5beta)
Selection of points in 3D View can result in curves in two different planes.
Something to do with cplane and Frames, or cplane z points, I guess.
It is an 8 year old script. Back when much script was placed in .htm file, for speed. (No longer necessary.)
The script seems to work fine in Top, Front and Right views.

When using the following code in 3D view:
var cplane = pointpicker.ptframe;
what orientation is used for cplane?

Still studying...
Will try it in MoI4 tonight...

- Brian

It is probably NOT a MoI bug (?)